Valve



May 6 1924. ,K 1,492,599 l H. D. HILDEBRAND VALVE Filed Feb. 27A. 1922 2 sheets-sheet 1 Patented May 6, i924.

STS

HARRY D. HILDEBRAND, OF MOUNT VERNON, OHIO; ZAIDEE S. HLDEBRANVD ADMIN- ISTRATRIX 0F SAID HARRY D. HLDEBRAND, DECEASED.

VALVE.

Application filed February 27, 1922. Serial No. 539,439.

To all whom t may concern:

Be it known that l, HARRY D. H1LDE- BRAND, residing at Mount Vernon, in the county of Knox and State oi' Ohio, a citizen or the United btates, have invented or discovered certain new and useful Improvements in Valves, or' which improvements theicollowing is a speciiication.

ln Letters Patent No. 1,229,456, granted June i2, 191i, is described and shown a construction oi: valve mechanism having in combination oppositely disposed valve seats having ports therethrough and valves consisting ot' resilient metal strips which were so supported by abutments in operati ve relation to the ports that the strips couldl be bent or flexed by the pressure of fluid to permit of escape of liuid through the ports. lin one or" the constructions shown in said patent, vthe supporting abutments were arranged adjacent to the ends of the strip and the opening flexure of the spring was intermediate such abutments. ln another i'orin the supporting abutment is arranged to bear against the strips at points approximately midway their lengths so that the opening of the valve is due to the iiexure of the strip on opposite sides of the abutments.

rlhe invention described and claimed hereink has i'or its object a construction of valve mechanism, in which the valves are maintained in normal or closed position by a suitably constructed and arranged resilient means, and the. opening of the port is ei` 'ected by substantially equal movement of the strip for its entire length against'such pressure or the primary or initial opening or by such equal movement and the opening completed by the iiexure of the valve strip and a further lexure of the spring. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Fig. l is a top plan view showing the improvement embodied in a valve mechanism for an air or gas compressor; Fig. 2 and Fig. 3 are sectional views on planes indicated respectively by the lines H-Il and Ill-IH, Fig. l; Figs. 4, 5, 6 and 7, 8 and 9, are diagrammatic views of dierent arrangements and constructions of springs.

In the practice of the invention, the metal strips l and their controlling spring or springs 2 are arranged in grooves 3 in the block 4 which may be of any peripheral contour, and the grooves may be parallel as shown herein or radial as shown in the patent herein before mentioned. The ribs 5 intermediate or" the grooves are made hollow for the iow of gas, air or other Hows to the ports 6 formed in the side walls 0i. the ribs as shown in Fig. 3.

rllhe valves consist oi' metal strips which are yieldingly held on their respective seats by means of springs 2. ln the construction shown in Figs. l, 2, and 3, each spring has one end curled over as at 6 and the portion intermediate the ends slightly bowed, and thesprings forming apair are placed together so that the straight end of one spring will bear on the curl 6 of the other spring` Nhen so arranged and placed between ad joining valves, the convex surfaces of the springs will bear against the valves at about the middle ofthe latter. The strips ot meta-l forming the valves may be made of such rigidity relative to the resilience of the body portion of the springs that the initial opening movement of the valve will be due to the yielding of the spring. In the con struction shown in Figs. l, 2, and 3, such initial movement or the valve will cause a flattening ot the bowed portions of the springs and the valves will bear for approximately their entire length on the springs, and the movement of the ends of the valves will be resisted by the curled portions 6 ot the springs. The valves are made ot such resistance that when they encounter the added resistance of the curls 6, there will be a ilerure of the portions of the valves intermediate the ends. n

is shown in Fig. 4 a single bowed spring 2a may be employed, the ends ot1 said spring bearing against one valve near its ends, while the middle portion of the spring bears against the other valve.

ln lieu of a single spring as shown in Figs. l, 2, and 3, two springs may be interposed between the valve strips as shown in Figs. 4, 5, 6, 7 and 8.

In the construction shown in Fig. 5 the springs are arranged to bear at their ends in the strips and against one another` at a point intermediate the ends while Fig. 6 shows a reversed arrangement of the springs, the springs being in contact with the valve at points intermediate their ends,

While the latter are inA contact. In the oonstruction shoWn in Fig. 7, tWo springs are employed, each bearing at their ends on one strip or valve', and at an intermediate point on the opposite strip or valve.

In lieu of elliptical springs other shapes or constructions of springs may be employed without departing from the spirit ofthe invention described and claimed herein. As for example, tvvo substantially U-shaped springsr as 2a may be so arranged intermediate the valves that their ends Will beary on they respective valves, as shown in Fig. 8. In order to prevent the springs 2b being tippedl 'from operative positions, they. are formed with eyes a engaging pins 8 projecting 'from-the bottoms'o the grooves 3.

As shown in Fig'. 9, spiral springs 2b may be employed. The eyes or" the spiral are slipped ontopins 9 inthe bottoms ol' the grooves 3, While the outer members or coils of they spiral have diametrica'lly opposite p'oints'in Contact with the respective valve strips.

It is characteristic of the construction shown herein that the resilient means interposed between the valves is operative on both valves;` This characteristic is4` found in theform shown in Fig; 5 andv Fig. 6, lfor although neither spring is in direct engagement with both valves, the springs have their ends or points intermediate the ends in contact with each other so that each valve is controlled by both springs.

I claim herein as my invention:

l. A valve mechanism for pumps having in combination oppositely disposed valve seats, fiat strips of suitable material for closing said ports and means adapted to exert a resilient pressure against portions of the valves to hold them on their seats and a substantially higher pressure on other portions of the valves after the initial opening movement oi the valves.

2. AL valve mechanism for pumps having in` combination oppositely disposed valve seats, valves formed of fiat strips of suitable material for closing said ports and means for exerting resilient pressure against intermediate portions o't the valves to hold them in closed. positions and a higher pressure against the end portions of the valves after the initial opening movement of the valves.

3. A valve mechanism for pumps having in combination oppositely disposed valve seats, valves formed offiat strips of resilient material, and resilient means interposed between the valves, said, means consisting of resilient strips bowed longitudinally and having one end curled inwardly, said strips being` oppositely disposed.

In testimony whereof I have hereunto set my hand.

HARRY D. HILDEBRAND. 

